// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- description: > Invocation of the constructor's `resolve` method es6id: 25.4.4.3 info: | 11. Let result be PerformPromiseRace(iteratorRecord, C, promiseCapability). [...] 25.4.4.3.1 Runtime Semantics: PerformPromiseRace 1. Repeat [...] h. Let nextPromise be Invoke(C, "resolve", «nextValue»). ---*/ var p1 = new Promise(function() {}); var p2 = new Promise(function() {}); var p3 = new Promise(function() {}); var resolve = Promise.resolve; var callCount = 0; var current = p1; var next = p2; var afterNext = p3; Promise.resolve = function(nextValue) { assert.sameValue( nextValue, current, '`resolve` invoked with next iterated value' ); assert.sameValue( arguments.length, 1, '`resolve` invoked with a single argument' ); assert.sameValue(this, Promise, '`this` value set to the constructor'); current = next; next = afterNext; afterNext = null; callCount += 1; return resolve.apply(Promise, arguments); }; Promise.race([p1, p2, p3]); assert.sameValue( callCount, 3, '`resolve` invoked once for each iterated value' ); reportCompare(0, 0);